Oil wiper



May 7, 1935.

G. B. EGGERT OIL WIPER- Original Filed Feb. 16, 1953 IA'VENTOB, -lljTfll.B,E66-EE7'- Deceased 3 BEENHED H, L/SKOM kimistrator.

Patented May 7, 1935 i 1' :3:

UNITED STATES 011. WIrEa Gustav B. Eggert, deceased, late of Saginaw, IMich., by Bernard H. Liskow, administrator, Saginaw, Mich., assignor to.Baker Perkins Company, Inc., Saginaw, Mich., a corporation of New YorkOriginal application February 16, 1933, Serial No. 657,040. Divided andthis applicationMarch 5, 1934, Serial No. 714,067

This application pertains to devices for feeding and spreadinglubricating oil evenly-over relatively reciprocating surfaces, and is adivision of United States patent application of Gustav B. Eggert, SerialNo. 657,040, filed February 16, 1933. The invention has for one objectthe provision of improved lubricating means for dough dividers havingrotatably mounted heads which reciprocate on their axes between theirdough-receiving and discharging positions as is more fully described inthe patent application referred to above.

This has been accomplished by providing, in a rotary head dough dividerof this kind, a scraper blade to gather and move a film of oil, fed ontothe Working face from a stationary reservoir, either into a secondreservoir on the movable head, or to a point from which it can flow bygravity into said second reservoir.

A layer of oil is applied to the moving surface from the stationaryreservoir or other feeding means, as the surface moves away from thereservoir, and on the reverse travel of the surface the scraper wipesthe film of oil ahead of it until it flows into the oil receptacle orpocket in the moving head, whence it flows to lubricate thedough-measuring pockets and the pistons operating therein. Thus adefinite limited quantity of oil is scraped from the face into the oilpocket on each complete oscillation of the head.

The invention has for a further object the provision of a scraper,co-operative with such a relatively reciprocating surface in doughdividers or other machines, which will gather and impel a supply of oilover the surface on its motion in one direction relative to the scraper,and on the reverse motion of the surface will travel over and past afreshly applied layer of oil to its original position ready to move thesaid fresh layer of oil over the surface.

Straight-edged oil scrapers do not entirely satisfactorily maintaintheir working relationship to the co-operative surfaces, and do nottherefore scrape up and deliver at all times the same quantity of oil oneach working stroke. As a result from time to time the machine partseither are under-lubricated or oil is wasted. The reason for this isthat, on its reverse or non-working stroke, a blade of this type mustpass over the oil film next to be acted on without scraping from thesurface behind it any material quantity of the newly-spread layer ofoil. To avoid this, the tension of the blade and its clearance from thesurface on the reverse stroke must be precisely and delicately adjustedand regulated.

Bearing play; slight eccentricity of a cylindrical surface, and surfaceirregularities in operation of the machine set up vibration andoscillation which eventually disturb such delicate ad justment.-

The object of the present invention is to obviate these difiiculties byproviding an improved blade which can be simply and inexpensivelyinstalled and which will operate satisfactorily for long periods withoutrequiring readjustment.

The invention consists of a blade to be mounted in scraping relation toa relatively reciprocatory surface over which oil is to be moved, andhav-' ing its working edge notched or .toothedto permit free passage ofan oil film between the blade and the surface during their relativemotion in one direction, and on the reverse motion to scrape up and movethe oil film over which the blade has previously passed.

The application of the invention to a rotaryhead dough-divider isillustrated in the accompanying drawing and is described in detailbelow.

Referring to the drawing, Fig. 1 is a top plan view of the invention asapplied to the dividing head of a dough divider. The teeth on the bladeand the spaces between them are exaggerated to more clearly show theirconstruction.

Fig. 2 is a diagrammatic side elevation of the dividing head and bladeshown in Fig. 1.

Referring to Figs. 1 and 2, a scraper blade I having teeth 2 with gapsor notches 3 between them is mounted on the stationary machine frame 4of the divider in scraping relation to the arcuate working surface of arotary divider head 4a. The blade is caused to bear resiliently againstthe surface, by making it of spring steel, or by providing suitablespring mountings.

A reservoir 5 on the machine frame supplies oil to the working face ofthe head 4a, which at each counter-clockwise motion picks up a film ofoil from the reservoir. During such counterclockwise motion of thedividing head a substantial portion of the oil film flows through thenotches 3 under and past the edge of the scraper blade I, due to thedirection of motion of the head and the angle between the blade and thesurface. During the clockwise return motion of the head the previouslydeposited film of oil is scraped by the blade 'I to the left over theworking surface until it flows into a receptacle 6 in the head, fromwhich it flows to the pistons and other Working parts.

Since the blade bears with constant pressure on the face of the head atall times, the same amount of oil passes under it on eachcounterclockwise motion of the head. Therefore, equivalent quantities ofoil are scraped into reservoir 6 during all clockwise motions of thehead. In the case of the prior straight-edged blade means had to beprovided in mounting the blade, or in other ways for causing the bladeto clear the surface of the head on its counter-clockwise motion so thatit feathered or passed over the layer of oil which it was to pick up andmove on the subsequent clockwise stroke. The clearance had to remainconstant to thousandths of an inch. To maintain this fine adjustment wasmechanically very difficult. The present invention avoids thisdifficulty and at the same time is very simple in construction andmounting.

While: there is shown and-described an improved blade applied to thereciprocating head of a dough divider, it is capable of modificationboth in construction and the purposes to which it may be put withoutdeparting from the spirit of the invention. For example, it is equallyadapted to use with any reciprocating surfaces, plane or cylindrical, ofother machines. Also, various modifications of the blade edge may bemade, as in the spacing, shape and size of the notches in the scrapingedge, as may be determined bythe consistency of the lubricant andtheamount to be scraped from the surface at each working stroke. e

The essential and novel feature is that apertures or notches areprovided in the working edge through which oil can flow, avoiding thenecessity for a feathering action of the blade as was heretofore thecase.

Nor is it essential that the stationary wiper be used in co-operationwith a reciprocatory surface. It is equally applicable to installationsin which the blade reciprocates over a stationary surface to which oilis fed, or in which both the surface and blade may reciprocaterelatively to each other.

Having thus described the invention, what is claimed and desired tosecure by Letters Patent is:

1. In a dough divider having a dividing head mounted for rotaryreciprocation, an oil reservoir in said head, a stationary oil reservoirarranged to feed a film of oil onto the Working face of said head duringits motion in one direction, and a stationary scraper positioned betweensaid reservoirs' in co-operative relationship to the working face of thehead to impel the oil of said film into the reservoir in said headduring its motion in the opposite direction.

2. In combination with a reciprocatory surface to which a layer ofoil isfed, a blade mounted in scraping relation to'said surface and having itsedge notched to permit passage of said, oillayer between the surface andblade more freely during the motion of said surface in one directionthan in the other. l

3. An oil scraper blade for mounting in scraping relationship to'arelatively reciprocatory surface, having its scraping edge provided witha plurality of notches.

BERNARD H. LIS KOW, Administrator of the Estate of Gustav B. Eggert,

Deceased.

